package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.*;
import com.itheima.reggie.mapper.OrdersMapper;
import com.itheima.reggie.service.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

/**
 * Created with IntelliJ IDEA.
 * User: zjz
 * Date: 2022/08/01 19:49
 * Description:
 * Version: V1.0
 */
@Service
public class OrdersServiceImpl extends ServiceImpl<OrdersMapper, Orders> implements OrdersService {

    @Autowired
    private ShoppingCartService shoppingCartService;

    @Autowired
    private OrdersService ordersService;

    @Autowired
    private OrderDetailService orderDetailService;

    @Autowired
    private UserService userService;

    @Autowired
    private AddressBookService addressBookService;

    /**
     * 用户下单
     * @param orders
     */
    @Override
    @Transactional
    public void submit(Orders orders) {
        //获取当前用户的id
        Long userId = BaseContext.getCurrentId();

        //查询当前用户的购物车数据
        LambdaQueryWrapper<ShoppingCart> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.eq(ShoppingCart::getUserId,userId);
        List<ShoppingCart> shoppingCartList = shoppingCartService.list(lambdaQueryWrapper);
        if (shoppingCartList == null || shoppingCartList.size() == 0){
            throw new CustomException("购物车为空，不能下单！");
        }

        //查出当前用户信息
        User user = userService.getById(userId);

        //查询用户地址信息
        Long addressBookId = orders.getAddressBookId();
        AddressBook addressBook = addressBookService.getById(addressBookId);
        if (addressBook == null){
            throw new CustomException("地址信息有误，不能下单！");
        }


        //原子操作，保证多线程的情况下也不错出错
        //计算总金额
        AtomicInteger amount = new AtomicInteger(0);

        //生成一个id订单号
        long orderId = IdWorker.getId();//订单号
        orders.setId(orderId);

        //遍历购物车数据
        List<OrderDetail> orderDetails = shoppingCartList.stream().map((item) ->{
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orders.getId());
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;

        }).collect(Collectors.toList());

        //向订单表插入1条数据


        orders.setNumber("" + orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));
        orders.setUserId(userId);
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() ==null ? "" : addressBook.getProvinceName())
        +(addressBook.getCityName() ==null ? "" : addressBook.getCityName())
        +(addressBook.getDistrictName() ==null ? "" : addressBook.getDistrictName())
        +(addressBook.getDetail() ==null ? "" : addressBook.getDetail()));
        this.save(orders);

        //向订单明细表插入数据，多条数据
        orderDetailService.saveBatch(orderDetails);

        //清空购物车数据
        shoppingCartService.remove(lambdaQueryWrapper);
    }

    //todo 历史订单 http://localhost:8080/order/userPage?page=1&pageSize=5
}
